Union



(No Model.)

L. ONDERDONK. LOOPER MECHANISM PQRSEWING MACHINES. No. 591,774. Patented Oct. 12, 1897 I l I L 1| @WN V UNITED STATES PATENT. OFFICE.

LANSING ONDERDONK, OF WINTHROP, MASSACHUSETTS, ASSIGNOR TO THE UNION SPECIAL SEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS.

LOOPER MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 591,774, dated October 12, 1897. Application filed December 5,1896. Renewed September 18,1897. Serial No. 652,179. (No model.)

To all whom it may concern;

Be it known that I, Lnnslve ONDERDONK, a citizen of the United States, residing at Winthrop, in the county of Suffolk, State of lllassachusetts,have invented certain new and useful Improvements in Sewing-Machines, of which the following is a description, reference being had to the accompanying drawings and to the letters of reference marked thereon.

In my application filed February 19, 1896, Serial No. 579,878, is shown, described, and claimed a looper-support having rearwardly and forwardly extending wings with means for giving to the looper its various movements, said means comprising an inclined rod or pin embraced by the rearwardly-extending wings, a member engaged by the forwardly-extending wings, and means for giving rotary movement to the inclined rod or pin. In one of the constructions shown in said application the inclined rod or pin is bent near the point of coincidence of its axis with the axis of the main shaft and has a forwardly-extending straight portion parallel with the axis of the main shaft, which straight portion is embraced by the forwardly-extending wings on the looper-carrier.

The present application, aside from covering certain details of construction illustrated as modifications in said application, also includes an arrangement in which the axis of the straight portion is coincident with the axis of the driving shaft, or, broadly, the present invention covers a driving-shaft, a looper-carrier having 'a way or cam-groove, with means for giving to the looper-carrier its various motions, said means comprising an inclined crank engaging the looper-carrier and a member fixed against lateral movement engaging the way or'cam-groove.

In the accompanying drawings, which illustrate the invention, Figure l is a sectional plan view of the end of the bed-plate or casing of a sewing-machine, showing the looperoperating mechanism. Fig. 2 is an end view, and Figs. 3 and 4 are respectively views similar to Figs. 1 and 2 of another way of carrying out my invention.

In the drawings the feature of the sewingmachine other than specifically referred to may be of the type shown in my aforesaid application. V

.-The driving-shaft B has at its outer end a collar 0, provided with an inclined projection D, having a socket oropening in which is secured the inner end of the looper rod, pin, or bar E. As shown, in Figs. 1 and 2, this bar projects from its point of attachment to the projection D on an oblique line toward the plane of the longitudinal axis of the main shaft. At the point of coincidence of its axis with the axis of the main shaft it is bent and provided with a short and straight portion F, whose axis is coincident with the axis of the driving-shaft.

G represents a looper-carrier, which is herein shown as secured on the transverse shaft H, mounted to slide and rock in bearings; but it will be understood that said shaft need not be employed, but that the looper-carrier may have trunnions which slide and rock in thesebearings on the machine-frame. It will also be understood that this looper-carrier need not necessarily have a sliding and rocking movement, but both its loop-taking and loop-leavin g, as well as needle-avoiding,movements may be rocking movements, the loopercarrier being supported in the manner illustrated in patent to Rontke, No. 568, 702.

The looper-carrier has rearwardly-extending wings or lips, of which only one, I, is shown, which lips receive between them the rod E,as shown. The looper-carrier also has two flanges L, arranged at an inclination to the longitudinal axis of the main shaft, and between these flanges the part F of the looperoperating rod fits snugly, whereby in the rotation of the main shaft and the consequent rotation of the looper-rod in the oscillating movement of the transverse shaft one or the other of the flanges L will have a sort of wedging action against the pin F, thus giving a sidewise or needle-avoiding movement to the looper-carrier and the lips attached thereto, the part F having no sidewise move-- ment, inasmuch as its axis is coincident with the axis of the driving-shaft.

Figs. 3 and 4 illustrate the construction for which in the present case I intend to make specific claims, and in the construction therein illustrated a post M, having a screwthreaded end, is secured by the nut N to the casin g. This post is arranged vertically and is provided at or near its upper end with an opening for the passage of a stud f, secured thereto by the nut g and carrying on its inner end a stationary cam n, which fits between the inclined flanges L. In this construction it will be seen that the pin F (shown in the other figures) is dispensed with, the part n in this instance being the member fixed against lateral movement.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A sewing-machine comprising a drivingshaft, a looper-carrier provided with a way or cam-groove with means for giving to the looper-carrier its various movements, said means comprising an inclined crank engaging the looper-carrier and a member fixed against lateral movement engaging the way or cam-groove, substantially as described.

2. In a sewing-machine, a looper, a support therefor having rearwardly and forwardly extending wings, and means for operating the same to give loop-taking, loop-leaving and needle-avoiding movements to the looper, said means comprising an inclined crank embraced by the rearwardly-extending wings, a member fixed against lateral movement engaged by the forwardly-extending wings and means for giving rotary movement to the inclined crank, substantially as described.

3. A sewing-machine comprising a drivingshaft, a looper-carrier mounted to slide and ment engaging said way or cam-gr0ove,whereby in the oscillation of the looper-carrier the latter is caused to slide in its bearings, substantially as described.

4. In a sewing-machine the combination of a driving-shaft, a looper-carrier with connections between the driving-shaft and loopercarrier for oscillating the latter, a rigid vertical post secured to the machine-frame and a fixed stud secured to said post and-engage ing a way on said looper-carrier whereby in the oscillation of the latter, a sidewise movement will also be imparted to it, substantially as described. V

5. In a sewing-machine a driving-shaft, a looper-carrier having an inclined way, means for oscillating said looper-carrier, a rigid vertical post secured to the frame of the machine, a stud supported. by said post, and a cam on said stud in engagement with the inclined way, substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

LANSING ONDERDONK.

Witnesses: I

F. S. FAWCETT, A. H. HATCH. 

